Safety appliance for elevators.



H. W. SAYLES. SAI'ETY APPLIANCE FOR ELEVATORS. APPLICATION FILED APILZQ. 1910.

982,536, Patentd Jam 24, 1911'.

2 SHEETS-SHEET 1.

H. W. SAYLES.

SAFETY APPLIANOB FOR ELEVATORS.

' ABPLIOATIOH FILED 1211.22. 1910.

982,536 1 Patented Jan. 24,1911. 7 K 2 5HEETB-BHBET 2- I4 awuwwtov UNITED s'rArEs PATENT orries.

HENRY w. SAYLES, or

PEORIA, ILLINOIS, assrsnon or ONE-THIRD T HERVA I. WAGGONER, or PEORIA, rumors.

SAFETY APPLIANCE FOR ELEVATOR-S.

Specification of Letters Patent Patented Jan. 2- 1911.

Application filed April 22, 1910. Serial No..55 8,98 1.

i the accompanying drawing.

A large proportion of elevator accidents are due to doors being open when they should be closed, and the object of this invention is to make it impossible to start the elevator until the doors are properly adjusted. This object is attained by putting the; elevatoroperating motor out of commission so long as any door is open.

In the accompanying drawings, Figure 1 shows my devices in side elevation, the doors of three landings being shown diagrammatically and parts not essential to an understanding of the invention being omitted.

- Figs.-2 and 3- areenlarged views showing in elevation and 'plan respectively, certain cable deflecting devices, seen also in Fig. 1. Fig.

4 is an enlarged elevation of certain circuit openingand closing devices. Figs. 5 and 6 are detail views of the devices seen in Fig. 4. Fig. 7 s a view similar to Fig. 1, showlnga slightly modified construction.' Figs. 8 and 9 are enlarged views correspondlng to Figs.

- 2 and 3 but showing the modified construe-- tion. a 1

Inv these views, A, A, A represent the usual laterally sliding well doors, or doors of the elevatorv shaft, each provided upon one side with an adjustable push-bar A.

To the wall-of the shaft, or other suitable sup or't, and opposite the push-bars, respective y, are fixed frames B, each provided with a sliding member B made up of two parallel bars B, B, in the same horizontal %lane and connected together at their ends.

ach member B alines with the corres 0ndmg push-bar and slides lll'WEt s 111 its 'ame.

' Between the two bars a pul ey B isrotatably mounted to .move' with the bars, and

upon the frame, above and below the sliding member, respectively, two pulleys B, B are rotatably fixed, 1n the plane of the pulley B and atv a reater distance from the door opening. cable C, fixed at D, above, in the plane of the pulleys, passes downward betweenthe pulleys B on the one side and the sets of pulleys B", B on the other, the

pulleys being so locatedrelatively that when the cable is straight it is tangent to all. The parts are so arranged that when any door is closed its push-bar-forces the slidingmemher from the door opening and thus moves itspulley between the two companion pulleys deflecting the cable and, since the upper end of the same is fast, virtually shortening it or drawing its lower portion upward. The lower end of the cable is onnected to a circuit breaker which, so long as all the doors 'areclosed, holding the cable deflected at each set of pulleys, is held in circuit closing position, but inoves from that osition whenever owing to the oponin of any door the cable is permitted to straighten at the corresponding point. As shown, this circuit breaker. or switch is mounted in'a suitable frame H and consists of an insulating arm F pivoted at F near one end and having at its opposite end and'upon opposite faces of the arm electrically connected contact pieces F which when the arm is swung upward on its pivot are pressed between spring cintact pieces G, G of phosphor bronze fixed to two opposite faces of a fiber block G secured in the frame H. These contact pieces are connected, respectively, by wires G", G, and binding posts Gr with the ends of the divided conductor G", as shown, of the circuit includin the motor G which operates the elevator, ut obviously the circuitthus broken may be'any circuit which controls the operation of the motor.

Thecable C is preferably connected with the switch arm, 'between its ends, through an insulator C, a, coiled spring C and a rod C, the latter being provided with a weight C and having its lower end flattened and slotted to receive a ivot C fixed in the switch arm. Preferably, this rod whenin its lower position rests upon a fiber block C fixed in the frame.

Obviously, the cable is virtuallyslonger or shorter according as any door is open or any door is open, the motor controlling cir-- cui't is bro-ken and consequently the motor is inetlective for moving the elevator, regard- I less-of the opening or closing of any circuit straighten.

member of the combination.

Figs. 7, 8, 9 illustrate a sort of reverse construction wherein the switch is operated by the virtual shortening of the cable. In this form, the frames B of the primar form are replaced by-frames I, and the pu leys I,.I I so placed that when the'door is closed they do not deflect the cable. The compound bar which carries the movable pulley is urged toward the door opening by springs I, whereby when the door is open the bodily movable pulley is pressed between the other two, deflecting the cable, but when the door is closed the sliding bar, I, is pushed back with its pulley allowing the cord to In this form, the switch arm K, is centrally pivoted at K, and the cable, which is provided with the insulator J and Weight J, is attached or connected to the end of the arm. Thus when any door is 'open the cable is deflected at the corresponding. point, and the motor controllingcircuit is. broken; but when all the doors are closed,

gravity closes the circuit putting the motor into commission, so that it may be controlled by the operator in the usual way.

Throughout this application, the term 021-- ble is used generically to designate a chain, wire, or other cable.

\Vhat I claim is:

1. The combination with a door member of an elevator shaft, of an elevator operat ing electric motor, a circuit controlling the operation of the motor, a circuit breaker in said circuit, a weighted cable connected with said circuit breaker and extending upward alongside the door opening, a frame fixed alongside the door opening, pulleys rota tably fixed to said frame on one side of the cable, a horizontally sliding member mountosasse eration of the motor, a circuit breaker in' said circuit, a vertical cable, fixed above, passingalongside the sides of all the door openings and-connected below to said circuit breaker, frames fixed alongside the path of said cable and opposite said doors, respectively, horizontally sliding members mounted in said frames, respectively, pulleys rotatably fixed to each .of said frames on one side of the'cable and respectively above and below said sliding member, a pulley rotatably mounted on said sliding member.

and upon the opposite side of the cable, and an adjustable push-bar mounted upon each door inalinement with the corresponding sliding member.

3. The combination with the door of an elevator shaft, of an elevator operating electric motor, a circuit controlling the operation of the motor, a vertically swinging cir cuit breaker in saidcircuit, a weight tending. to open the circuit breaker, a cable'connected with the circuit breaker and extend ing upward alongside the door opening, a frame fixed alongside the door opening, a sliding member mounted on the frame to slide toward and from the door member, and

pulleys mounted upon the frame and sliding member upon opposite sides of the cable and in position .to hold the cable defiectedwhen the door is closed, whereby the weight is prevented from opening the circuit breaker. Y

In testimony whereof I aflix my signature in presence of two witnesses.

HENRY w. sAYLEs.

\Vitnesses E. Mrrena, GEO. B. SUoHEn. 

